Resposta:
×+2y-2=0 ×=2y-2 2×+y-1=0
×=2-2 ×=2+y-1
y=0. y=2+-1=0
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Resposta:
×+2y-2=0 ×=2y-2 2×+y-1=0
×=2-2 ×=2+y-1
y=0. y=2+-1=0